<h4>Tool</h4><table border="0"><tr><td valign="top"><b>Name</b></td><td valign="top">Sky View Factor</td></tr><tr><td valign="top"><b>ID</b></td><td valign="top">3</td></tr><tr><td valign="top"><b>Author</b></td><td valign="top">O.Conrad (c) 2008</td></tr><tr><td valign="top"><b>Specification</b></td><td valign="top">grid</td></tr></table><hr><h4>Description</h4>Calculation of visible sky, sky view factor (SVF) and related parameters.

References:
Boehner, J., Antonic, O. (2009): 'Land-surface parameters specific to topo-climatology'. in: Hengl, T., Reuter, H. (Eds.): 'Geomorphometry - Concepts, Software, Applications'. Developments in Soil Science, Volume 33, p.195-226, Elsevier

Hantzschel, J., Goldberg, V., Bernhofer, C. (2005): 'GIS-based regionalisation of radiation, temperature and coupling measures in complex terrain for low mountain ranges'. Meteorological Applications, V.12:01, p.33-42, doi:10.1017/S1350482705001489

Oke, T.R. (2000): 'Boundary Layer Climates'. Taylor & Francis, New York. 435pp.
<hr><h4>Parameters</h4><table border="1" width="100%" valign="top" cellpadding="5" rules="all"><tr><th>Name</th><th>Type</th><th>Identifier</th><th>Description</th><th>Constraints</th></tr>
<tr><th colspan="5">Input</th></tr><tr><td>Elevation </td><td>Grid (input)</td><td>DEM</td><td></td><td></td></tr><tr><th colspan="5">Output</th></tr><tr><td>Visible Sky</td><td>Grid (output)</td><td>VISIBLE</td><td>The unobstructed hemisphere given as percentage.</td><td></td></tr><tr><td>Sky View Factor</td><td>Grid (output)</td><td>SVF</td><td></td><td></td></tr><tr><td>Sky View Factor (Simplified) (*)</td><td>Grid (optional output)</td><td>SIMPLE</td><td></td><td></td></tr><tr><td>Terrain View Factor (*)</td><td>Grid (optional output)</td><td>TERRAIN</td><td></td><td></td></tr><tr><td>View Distance (*)</td><td>Grid (optional output)</td><td>DISTANCE</td><td></td><td></td></tr><tr><th colspan="5">Options</th></tr><tr><td>Maximum Search Radius</td><td>Floating point</td><td>RADIUS</td><td>This value is ignored if set to zero.</td><td>Minimum: 0.000000
Default: 10000.000000</td></tr><tr><td>Method</td><td>Choice</td><td>METHOD</td><td></td><td>Available Choices:
[0] multi scale
[1] sectors
Default: 1</td></tr><tr><td>Multi Scale Factor</td><td>Floating point</td><td>DLEVEL</td><td></td><td>Minimum: 1.250000
Default: 3.000000</td></tr><tr><td>Number of Sectors</td><td>Integer</td><td>NDIRS</td><td></td><td>Minimum: 3
Default: 8</td></tr></table>(*) <i>optional</i>